Manual Pages for UNIX Operating System command usage for man mount_hsfs

System Administration Commands                     mount_hsfs(1M)



NAME
     mount_hsfs - mount hsfs file systems

SYNOPSIS
     mount -F hsfs [generic_options]
          [-o FSType-specific_options] [-O ] special | mount_point


     mount -F hsfs [generic_options]
          [-o FSType-specific_options] [-O] special mount_point


DESCRIPTION
     mount attaches an ISO 9660 filesystem (the High Sierra  file
     system,  hsfs,  is  a  draft predecessor to ISO 9660, so the
     name reflects the filesystem's history) to  the  file   sys-
     tem  hierarchy at the mount_point,  which is the pathname of
     a directory. If mount_point has any contents  prior  to  the
     mount  operation,  these are hidden until the file system is
     unmounted.


     If  mount is invoked with  special or   mount_point  as  the
     only  arguments,   mount will search  /etc/vfstab to fill in
     the    missing    arguments,    including    the     FSType-
     specific_options; see mount(1M) for more details.


     The hsfs file system supports direct mounting of files  con-
     taining  the  file  system  as  well  as  block devices. See
     mount(1M) and lofiadm(1M).


     A file system conforming to ISO 9660 can contain  extensions
     that  allow  it  to overcome limitations of the original ISO
     9660:1988 (version  1)  standard.  The  following  types  of
     extensions are supported by hsfs:

     Rock Ridge extensions

         This is the preferred type of  extension  as  it  allows
         file  attributes,  name  length, and types equivalent to
         those on other UNIX-style filesystems. Example  of  sup-
         ported  features are device special files, POSIX permis-
         sions, symbolic links, and filenames of up to 255  bytes
         in  length.  Rock  Ridge   extensions  also  remove  the
         ISO9660:1988 restriction on  maximum nesting  depth  for
         directories  (eight levels). hsfs  automatically detects
         the presence of Rock Ridge  extensions  and  uses  them,
         unless mount options are specified to disable the use of
         Rock Ridge or to use a different extension.




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System Administration Commands                     mount_hsfs(1M)



     ISO9660:1999 (version 2) extensions

         The first version of ISO9660,  released  in  1988,  sup-
         ported   only  uppercase ASCII filenames of no more than
         31 characters in length. ISO9660 version 2, released  in
         1999,  provides an extension that allows filenames of at
         least 207  bytes  that  can  use  UTF-8  characters  and
         removes  the  limitation on the nesting depth for direc-
         tories. Unlike Rock Ridge, it does not  provide  support
         for  UNIX-style  file  types  and  file attributes. hsfs
         automatically detects this extension and will use it for
         filename lookup if no Rock Ridge extensions are found on
         the media.


     Joliet extensions

         The Joliet extension was devised by Microsoft  to  allow
         Unicode  (UCS-2)  long filenames with CDROM-based media.
         It allows filename lengths of up to 110 Unicode  charac-
         ters  and  does  not  support  UNIX-style file types and
         attributes. hsfs falls back to using Joliet if  such  an
         extension  is present and neither Rock Ridge nor ISO9660
         version 2 extensions are found.

         If filenames are longer than  the  64  UCS-2  characters
         officially  allowed  by  Microsoft (that is, 110 Unicode
         characters), they can  translate  to  up  to  330  UTF-8
         octets.  Filenames that translate to more than 255 UTF-8
         octets will be truncated.


OPTIONS
     generic_options

         See mount(1M) for the list of supported options.


     -o

         Specify  hsfs file system specific options.  If  invalid
         options  are specified, a warning message is printed and
         the invalid options are ignored. The  following  options
         are available:

         global |  noglobal

             If global is specified and  supported  on  the  file
             system,  and  the  system  in  question is part of a
             cluster, the file system will be globally visible on
             all  nodes of the cluster. If noglobal is specified,
             the mount will not be globally visible. The  default



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System Administration Commands                     mount_hsfs(1M)



             behavior is noglobal.


         ro

             Mount the file system  read-only.   This  option  is
             required.


         rr | nrr

             Enable (rr) or disable (nrr) the use of Rock  Ridge.
             rr  is the default and need not be specified. If you
             use nrr and Rock Ridge extensions are present in the
             file system, ignore them and search for other avail-
             able extensions or fall back to plain ISO9660.


         vers2 | novers2

             Enable or disable  the  use  of  ISO9660  version  2
             extensions.  If  vers2 is specified and ISO9660 ver-
             sion 2  extensions  are  available,  hsfs  will  use
             ISO9660   version 2 even if the file system contains
             the preferred Rock  Ridge  extensions  as  well.  If
             novers2  is  specified,  it  will fall back to using
             either Joliet extensions or plain  ISO9660  even  if
             ISO9660 version 2 extensions are available.


         joliet | nojoliet

             Enable or disable the use of Joliet  extensions.  If
             joliet is specified and Joliet extensions are avail-
             able, hsfs  will use them even if  the  file  system
             contains  the  preferred  Rock  Ridge and/or ISO9660
             version 2 extensions. If nojoliet is  specified,  it
             will fall back to using plain ISO9660.


         notraildot

             File names on High Sierra file systems consist of  a
             proper  name  and  an  extension  separated by a '.'
             (dot) character.  By default, the separating dot  is
             always  considered  part  of the file's name for all
             file access operations, even if there is  no  exten-
             sion   present.   Specifying   notraildot  makes  it
             optional to specify the trailing  dot  to  access  a
             file whose name lacks an extension.

             Exceptions: This option is effective  only  on  file



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System Administration Commands                     mount_hsfs(1M)



             systems  for  which Rock Ridge, ISO9660 version 2 or
             Joliet extensions are  not  active,  either  because
             they  are  not  present  on the CD-ROM, or they have
             been deliberately disabled via the nrr, novers2  and
             nojoliet option. If either extension is active, hsfs
             quietly ignores this option.


         nomaplcase

             File names on High Sierra/ISO9660  CD-ROMs  with  no
             extensions  present  should  be uppercase characters
             only. By default,  hsfs maps file names read from  a
             non-Rock  Ridge  disk  to  all lowercase characters.
             nomaplcase turns off this  mapping.  The  exceptions
             for   notraildot  discussed  above  apply  to  noma-
             plcase.



     -O

         Overlay mount.  Allow the file system to be mounted over
         an existing mount point, making the underlying file sys-
         tem inaccessible.  If a mount is attempted on  a  preex-
         isting  mount point without setting this flag, the mount
         will fail, producing the error: device busy.


EXAMPLES
     Example 1 Mounting and Unmounting a DVD Image Directly


     The following commands mount and unmount a DVD image.


       # mount -F hsfs /images/solaris.iso /mnt/solaris-image
       # umount /mnt/solaris-image



FILES
     /etc/mnttab

         table of mounted file systems


     /etc/vfstab

         list of default parameters for each file system





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System Administration Commands                     mount_hsfs(1M)



ATTRIBUTES
     See attributes(5) for descriptions of the  following  attri-
     butes:



     ____________________________________________________________
    |       ATTRIBUTE TYPE        |       ATTRIBUTE VALUE       |
    |_____________________________|_____________________________|
    | Availability                | SUNWcs                      |
    |_____________________________|_____________________________|


SEE ALSO
     lofiadm(1M), mount(1M), mountall(1M),  mount(2),  mnttab(4),
     vfstab(4), attributes (5)

NOTES
     If the directory on which a file system is to be mounted  is
     a symbolic link, the file system is mounted on the directory
     to which the symbolic link refers, rather than on top of the
     symbolic link itself.

































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